Dental thread tested: can a retraction cord protect gums during fillings?
NCT ID NCT07734935
First seen Jul 29, 2026 · Last updated Aug 05, 2026 · Updated 4 times
Summary
This trial investigates whether placing a retraction cord—a thin thread that pushes the gum aside—during a tooth restoration affects gum health. Adults with non-carious cervical lesions (tooth damage near the gumline not caused by decay) will receive composite restorations either with or without the cord. Researchers will measure gum inflammation, bleeding, and fluid markers over 28 days to see if the cord makes a difference.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- gingival retraction cord placed in the gum sulcus during restorative treatment
- What this could lead to
- If it works, this could help dentists choose techniques that minimize gum irritation during tooth repairs.
- What could go wrong
- This is a very small early-stage trial with only 10 participants, so results may not apply to everyone. The procedure itself may cause temporary gum discomfort.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
-
10 people
The number who actually took part.
- Started
-
Feb 2025
- Finished
-
Sep 2025
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 years and older
- Sex
-
Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age 18 years or older * Systemically healthy * Non-smoker * Periodontally healthy (whole-mouth bleeding on probing \<10%, mean probing pocket depth ≤3 mm, mean Plaque Index and Gingival Index ≤1.1) * At least 20 teeth in occlusion (full/near-full dentition) * At least 4 non-carious cervical lesions, each ≥1 mm in depth, involving both enamel and dentin, with vital pulp status Exclusion Criteria: * Presence of systemic disease * Use of medication known to affect inflammatory response during the study period * Inability or unwillingness to comply with follow-up visits * Pregnancy or lactation * Current smoking * Presence of periodontal disease
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for Gingival crevicular fluid are added.
Genom att skicka in godkänner du våra Användarvillkor
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Istanbul University Faculty of Dentistry
Istanbul, 34116, Turkey (Türkiye)
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Green tea rinse put to the test against braces bad breath
- Can a Protein-Packed toothpaste outperform fluoride alone?
- Plant-Based rinse put to the test against Gold-Standard antiseptic
- Which rinse or paste keeps braces gums healthier? trial puts two everyday products head to head
- Braces vs. clear aligners: which is gentler on your gums?
- AI reads your smile: predicting gum surgery outcomes before you go under